A: Which country is the smallest in the world?
B: I think it's Vatican City. / A: I wonder how small it is. / B: This book says Vatican City is 0.44km².
A: Which animal is the largest in the world?
B: I think it's the blue whale. / A: I wonder how large it is. / B: This book says the blue whale is about 30m long.
A: Who is the smartest student in the class?
B: I think it's Jihoon. / A: I wonder how smart he is. / B: The teacher says Jihoon got 100% on all his tests.
A: Which planet is the biggest in the solar system?
B: I think it's Jupiter. / A: I wonder how big it is. / B: The Internet says Jupiter is over 11 times bigger than Earth.
A: Which country is the happiest in the world?
B: I think it's Finland. / A: I wonder how happy it is. / B: The teacher says Finland got a happiness score of 7.7 in 2025.
A: Where is the coldest place on Earth?
B: I think it's the South Pole. / A: I wonder how cold it is. / B: This book says the average temperature of the South Pole is about -49°C.
A: What is the longest river in the world?
B: I think it's the Amazon River. / A: I wonder how long it is. / B: The Internet says the Amazon River is about 7,000km long.
A: Who is the oldest person in the world?
B: I think it's Ethel Caterham. / A: I wonder how old she is. / B: This article says Ethel Caterham is 116 years old.
A: What is the highest mountain in the world?
B: I think it's Mt. Everest. / A: I wonder how high it is. / B: This article says Mt. Everest is about 8,850m high.
A: Which animal is the fastest in the world?
B: I think it's the Peregrine. / A: I wonder how fast it is. / B: The teacher says the Peregrine can fly 389km/h.
A: Where is the hottest desert on Earth?
B: I think it's the Sahara Desert. / A: I wonder how hot it is. / B: This article says the temperature of the Sahara Desert can reach up to 50°C.
A: Who is the tallest person in the world?
B: I think it's Sultan Kösen. / A: I wonder how tall he is. / B: The Internet says Sultan Kösen is 251cm tall.